Oakley's original Inmate broke fashion rules. The Probation is their idea of a repeat offender. Instead of separate lenses, it has a single contour of pure Plutonite lens material. The sculptural frame takes advantage of C-5, a lightweight alloy of five metal compounds. This pair of sunglasses is engineered for all-day comfort, and when the heat is on, the Unobtainium sleeves on the stems are there to increase grip with moisture. It utilizes Polaric Ellipsoid geometry, an innovation of High Definition Optics (HDO) that maintains clarity all the way to the peripheral edges. It meets all ANSI Z80.3 standards for optical performance and precision, as well as Z80.3 basic impact standards. As far as UV protection goes, the proprietary lens material filters out 100% of all UV, not just UVA or UVB. Iridium lens coatings reduce glare and balance light transmission to maximize your vision.